| 초록 |
We investigate an unusual phase transformation of a zinc coordinated polymer having highly polar push-pull π-conjugated side-chains from 1D-to-3D phases. The highly polar push-pull π-conjugated side-chains such as (4-nitrophenyl)pyrrolidine (NPP) groups are introduced with coordination polymer backbone, consisting of 1,4-benzenedicarboxylic acid (BDC) and zinc nitrate and exhibit high dipole moments of about 7 D. The zinc coordinated polymers exhibit an unusual phase transformation from a soluble, solvent-stabilized 1D phase into an insoluble, metal organic framework–like 3D phase. It is attributed to interaction between the polar NPP groups in zinc coordinated polymers and polar species such as solvent molecules, transition metals and transition metal clusters. The zinc coordinated polymer was characterized using 1H NMR, scanning electron microscopy, infrared and UV-Vis-NIR spectroscopy, differential scanning calorimetry, thermogravimetric analysis and powder X-ray diffraction. |
